[willamette-fcst] Forecast - Thursday, July 10th, 2008
Willamette Valley Ag/Burning Forecast
willamette-fcst at listsmart.osl.state.or.us
Thu Jul 10 07:07:21 PDT 2008
Daily Smoke Management Forecast
Oregon Department of Agriculture
Smoke Management Program
Weather Outlook and Field Burning Advisory for Willamette Valley Growers and Fire Districts.
Thursday, July 10th, 2008 at 9:00am.
Agricultural burning is not recommended.
Preparatory burning is not allowed.
Propane flaming is not allowed.
Stack burning is not allowed.
A warm and sunny weather pattern will continue today for the
Willamette Valley. The morning Salem sounding showed temperatures
aloft had cooled about 10 degrees since yesterday and today\'s high
temperatures will be well below yesterday\'s. Highs should be mostly
in the low to mid 80\'s today.
The morning surface analysis showed a weak cold front moving
through eastern Washington. Low level flow turned onshore overnight.
However, a strong thermal trough remains over northern California and low
level winds will remain northerly in the Valley today. Mixing heights will
be favorable, near 5000 feet, but wind directions will be unfavorable for open
field burning today. The northerly winds will reach above 15mph and by
about 2pm relative humidities will drop below 30% and State Fire Marshall
burn-ban conditions are likely to be met.
N 10-15 this morning, N 13-18 this afternoon.
N 12-18 this morning, N 15-20 this afternoon.
Atmospheric Ventilation Conditions:
Maximum mixing height today will be near 5000 feet. Ventilation index 75.
Salem\'s high temperature today will be near 83.
Relative humidity drops to 50% by 8.
Minimum relative humidity will be near 25%.
Salem sunset tonight: 8:59pm; sunrise tomorrow: 5:37am.
The upper ridge that brought warm temperatures to the Valley
yesterday is being flattened today by an upper trough
swinging through southern British Columbia. That trough
will move east into the Canadian Prairies tomorrow and be
replaced by a weak upper ridge on Saturday. This will allow
temperatures to again climb into the low 90\'s. The upper
ridge will translate eastward on Sunday and a series of weak
upper troughs should keep temperatures near seasonal normals
through much of nest week. Rainfall is unlikely, however.
The passage of the upper troughs to the north may induce a
couple of marine pushes next week for possible burn
Tomorrow (11 Jul): Sunny. 47/86
Sat (12 Jul): Mostly Sunny. Warm. 50/90
Sun (13 Jul): Partly Cloudy. 52/86
Mon (14 Jul): Partly Cloudy. 54/80
Tue (15 Jul): Partly Cloudy. 52/79
Wed (16 Jul): Partly Cloudy. 51/79
Thu (17 Jul):
weather at oda.state.or.us
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